EP0998214A4 - Systeme et capteur d'oxymetrie foetale - Google Patents
Systeme et capteur d'oxymetrie foetaleInfo
- Publication number
- EP0998214A4 EP0998214A4 EP98930221A EP98930221A EP0998214A4 EP 0998214 A4 EP0998214 A4 EP 0998214A4 EP 98930221 A EP98930221 A EP 98930221A EP 98930221 A EP98930221 A EP 98930221A EP 0998214 A4 EP0998214 A4 EP 0998214A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- insertion rod
- sensor
- light
- circuit connector
- introducer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/1464—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters specially adapted for foetal tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14542—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring blood gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6848—Needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6879—Means for maintaining contact with the body
- A61B5/6882—Anchoring means
Definitions
- the above object is achieved by causing the measuring device to produce at least two distinct sets of wavelengths of light, each set containing at least two distinct wavelengths of light.
- the processing unit produces a measurement according to selectively weighted ratios of the light measured from the sets of wavelengths along any one of the optical measurement paths or along any combination of optical measurement paths including all optical measurement paths.
- the light emitter generates at least four wavelengths of light
- the processing system produces a measurement according to selectively weighted ratios of the light measured from a pair of or a combination of pairs of any two of the wavelengths.
- the sensor includes light emitters and light detectors disposed along multiple optical paths and are located on a single probe.
- Fig. 17 is a schematic diagram of an interface that provides a sensor diagnostic and identification function.
- Tab 39 provides a further advantage of helping to prevent circuit connector 9 from becoming twisted inside introducer tube 5. By providing tab 39 on an appropriate side of circuit connector 9, depending on whether insertion rod 7 is turned clockwise or counter-clockwise to attach the sensor, tab 39 pushes circuit connector 9 in the direction of the turning. Because tab 39 contacts the inside surface of introducer tube 5, if circuit connector 9 becomes snagged and starts to twist when the user turns insertion rod 7, tab 39 contacts circuit connector 9 and helps to prevent it from twisting.
- One embodiment of the present invention contemplates differentially driving the LEDs in sensor 11 , so that the signal pulses provided to the LEDs in a pair of conductors are equal and opposite one another.
- Using a differential drive for the LEDs improves low noise performance and permits conductors 54 to be located close together on circuit connector 9 because the signals on the two lines tend to cancel out one another.
- Safety is also improved by using a differential drive.
- the "J" Stage Needle 65 begins as a straight piece of tubing and is preferably formed from a precut length of tubing with an inner diameter of about 0.19 inches, an outer diameter of about 0.3 inches, and a length of about 1.13 inches.
- the material for tubing 91 is 21 1/2 RW 304 stainless steel, full hard hypodermic needle tubing. Other dimensions and materials may also be used, but, preferably, according to the invention, a relatively large gauge tubing is used to facilitate needle 65 better, more reliably, and reproducibly staying in the tissue.
- a mandrel is used to form the tubing into a spiral. However, as discussed above, the forming occurs at various stages.
- the "J” stage includes forming the tubing into a "J" shaped needle.
- an adapter module may be used to provide an interface between diagnostic equipment and a sensor system according to the invention.
- An identifying resistor 822 is provided on the left-hand side of terminal 820 across pins 3 and 5. Pins 3 and 5 on the left-hand side of terminal are disconnected from one another as long as circuit connector 9' is not coupled to terminal 820, thereby electrically isolating resistor 822. In which case, the external circuit recognizes the sensor assemble, which includes sensor 11 and circuit connector 9' as being disconnected. However, when circuit connector 9' is coupled to terminal 820, a bypass circuit 824 couples pins 2 and 5 on the right-hand side of terminal 820 thereby connecting resistor 822 cross conductors 826 and 828, which are the same conductors connected to the LED terminals. As a result, the external circuit sees resistor 822 between the LED terminals even though the resistor is not provided on sensor 11, as contemplated by the previous embodiment. In which case the external circuit recognizes the sensor assembly as being properly connected.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Optics & Photonics (AREA)
- Pediatric Medicine (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
L'invention concerne un dispositif de mesure optique présentant plusieurs trajets optiques entre une ou plusieurs sources lumineuses, un ou plusieurs photodétecteurs, et/ou produisant au moins deux ensembles de longueurs d'ondes lumineuses sur au moins un trajet, la mesure finale correspondant au résultat de la combinaison des mesures des ensembles de longueurs d'ondes lumineuses réalisées sur un ou plusieurs trajets optiques. Parmi les éléments contribuant à une meilleure sécurité et à une facilité d'utilisation figurent: une cavité réceptrice à l'extrémité proximale d'une tige d'insertion (7) présentant une extrémité libre de connecteur (9) de circuit de manière à éviter que ce dernier ne s'emmêle ou ne se coince; un mécanisme permettant de maintenir le capteur (11) à l'intérieur d'un tube (5) d'introduction lors du stockage et de l'insertion, et d'exposer une partie du capteur lorsque celui-ci est appliqué au foetus; une patte (13) disposée sur la tige d'insertion pour éviter que le connecteur de circuit ne s'emmêle ou ne se coince à l'intérieur du tube d'introduction; un élément de rotation provoquant la rotation du capteur pour autant que le couple appliqué sur ce dernier soit supérieur à une première valeur prédéterminée; un élément de libération par lequel le capteur se détache de la tige d'insertion si une force de traction dépasse une seconde valeur prédéterminée; un connecteur (9) de circuit comprenant au moins l'un des éléments suivants: un élément de raidissement disposé à l'extrémité proximale pour réduire la flexion au minimum, une couche de blindage, et au moins une fente destinée à augmenter la flexibilité du connecteur de circuit; et une interface comportant un élément d'identification détecté par un circuit exterieur uniquement si le connecteur de circuit est connecté à l'interface. La présente invention a également pour objet un procédé de fabrication d'une aiguille utilisée dans le capteur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09161340.6A EP2087839B1 (fr) | 1997-06-17 | 1998-06-15 | Système et capteur d'oximetrie foetale |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5095897P | 1997-06-17 | 1997-06-17 | |
US50958P | 1997-06-17 | ||
PCT/US1998/012394 WO1998057577A1 (fr) | 1997-06-17 | 1998-06-15 | Systeme et capteur d'oxymetrie foetale |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09161340.6A Division EP2087839B1 (fr) | 1997-06-17 | 1998-06-15 | Système et capteur d'oximetrie foetale |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0998214A1 EP0998214A1 (fr) | 2000-05-10 |
EP0998214A4 true EP0998214A4 (fr) | 2008-08-06 |
Family
ID=21968552
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09161340.6A Expired - Lifetime EP2087839B1 (fr) | 1997-06-17 | 1998-06-15 | Système et capteur d'oximetrie foetale |
EP98930221A Withdrawn EP0998214A4 (fr) | 1997-06-17 | 1998-06-15 | Systeme et capteur d'oxymetrie foetale |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09161340.6A Expired - Lifetime EP2087839B1 (fr) | 1997-06-17 | 1998-06-15 | Système et capteur d'oximetrie foetale |
Country Status (8)
Country | Link |
---|---|
US (1) | US7469158B2 (fr) |
EP (2) | EP2087839B1 (fr) |
JP (2) | JP4073970B2 (fr) |
CN (1) | CN1309341C (fr) |
AU (1) | AU756187B2 (fr) |
BR (1) | BR9810143A (fr) |
CA (1) | CA2303803A1 (fr) |
WO (1) | WO1998057577A1 (fr) |
Families Citing this family (151)
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US6018673A (en) | 1996-10-10 | 2000-01-25 | Nellcor Puritan Bennett Incorporated | Motion compatible sensor for non-invasive optical blood analysis |
US9042952B2 (en) | 1997-01-27 | 2015-05-26 | Lawrence A. Lynn | System and method for automatic detection of a plurality of SPO2 time series pattern types |
US8932227B2 (en) | 2000-07-28 | 2015-01-13 | Lawrence A. Lynn | System and method for CO2 and oximetry integration |
US9468378B2 (en) | 1997-01-27 | 2016-10-18 | Lawrence A. Lynn | Airway instability detection system and method |
US9521971B2 (en) | 1997-07-14 | 2016-12-20 | Lawrence A. Lynn | System and method for automatic detection of a plurality of SPO2 time series pattern types |
US20070191697A1 (en) | 2006-02-10 | 2007-08-16 | Lynn Lawrence A | System and method for SPO2 instability detection and quantification |
US6377842B1 (en) | 1998-09-22 | 2002-04-23 | Aurora Optics, Inc. | Method for quantitative measurement of fluorescent and phosphorescent drugs within tissue utilizing a fiber optic probe |
US6675031B1 (en) | 1999-04-14 | 2004-01-06 | Mallinckrodt Inc. | Method and circuit for indicating quality and accuracy of physiological measurements |
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US8611977B2 (en) | 2004-03-08 | 2013-12-17 | Covidien Lp | Method and apparatus for optical detection of mixed venous and arterial blood pulsation in tissue |
US7534212B2 (en) | 2004-03-08 | 2009-05-19 | Nellcor Puritan Bennett Llc | Pulse oximeter with alternate heart-rate determination |
US7194293B2 (en) | 2004-03-08 | 2007-03-20 | Nellcor Puritan Bennett Incorporated | Selection of ensemble averaging weights for a pulse oximeter based on signal quality metrics |
US7392075B2 (en) | 2005-03-03 | 2008-06-24 | Nellcor Puritan Bennett Incorporated | Method for enhancing pulse oximetry calculations in the presence of correlated artifacts |
US7657294B2 (en) | 2005-08-08 | 2010-02-02 | Nellcor Puritan Bennett Llc | Compliant diaphragm medical sensor and technique for using the same |
US7590439B2 (en) | 2005-08-08 | 2009-09-15 | Nellcor Puritan Bennett Llc | Bi-stable medical sensor and technique for using the same |
US7725147B2 (en) | 2005-09-29 | 2010-05-25 | Nellcor Puritan Bennett Llc | System and method for removing artifacts from waveforms |
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US7869850B2 (en) * | 2005-09-29 | 2011-01-11 | Nellcor Puritan Bennett Llc | Medical sensor for reducing motion artifacts and technique for using the same |
US8092379B2 (en) | 2005-09-29 | 2012-01-10 | Nellcor Puritan Bennett Llc | Method and system for determining when to reposition a physiological sensor |
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Also Published As
Publication number | Publication date |
---|---|
CN1260696A (zh) | 2000-07-19 |
JP2008110213A (ja) | 2008-05-15 |
CA2303803A1 (fr) | 1998-12-23 |
AU7966598A (en) | 1999-01-04 |
WO1998057577A9 (fr) | 1999-07-01 |
EP0998214A1 (fr) | 2000-05-10 |
EP2087839B1 (fr) | 2013-05-22 |
EP2087839A2 (fr) | 2009-08-12 |
EP2087839A3 (fr) | 2009-10-21 |
JP4267048B2 (ja) | 2009-05-27 |
BR9810143A (pt) | 2001-11-27 |
AU756187B2 (en) | 2003-01-09 |
US7469158B2 (en) | 2008-12-23 |
WO1998057577A1 (fr) | 1998-12-23 |
CN1309341C (zh) | 2007-04-11 |
JP2002512549A (ja) | 2002-04-23 |
JP4073970B2 (ja) | 2008-04-09 |
US20050283059A1 (en) | 2005-12-22 |
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